Seed Characteristics and Seedling Emergence of Dalmatian Toadflax

In eastern Washington Dalmatian toadflax (Linaria dalmatica (L.) Mill) produces seeds for about 3 months, beginning in early July, with over 95% produced during the first 5 weeks. A large plant will produce a half million seeds under good conditions. Seeds are sharply angular, slightly winged, and 1...

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Bibliographic Details
Published in:Weed science 1970-11, Vol.18 (6), p.720-725
Main Author: Robocker, W. C.
Format: Article
Language:English
Subjects:
Agricultural soils
Agrology
Capsules
Desert soils
Dormancy
Germination
Linaria dalmatica
Seedlings
Seeds
Soil water
Tillage
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Summary:In eastern Washington Dalmatian toadflax (Linaria dalmatica (L.) Mill) produces seeds for about 3 months, beginning in early July, with over 95% produced during the first 5 weeks. A large plant will produce a half million seeds under good conditions. Seeds are sharply angular, slightly winged, and 1 to 2 mm long. Approximately 7,000 weigh 1 g. Seeds are spread by wind and browsing animals. Some seeds will germinate under laboratory conditions the same season in which produced, but germination from dry storage increases for 2 to 3 years, with a periodic low in November and a high in April. Over 90% germination is obtained with 2 to 3-year-old seeds in the laboratory. Germination in the field occurs in both spring and fall, and seedlings can emerge from a soil depth of 2 to 2.5 cm.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500034639